Electric reversing-switch and circuit-closer.



\ im ilmw C. HAAS.

ELECTRIC REVERSING SWITCH AND CIRCUIT CLOSER.

- APPLiOATION FILED JAN. 30, 1.913;

1,074,860. v Patented 0013.7,1913.

- IW Q Adm,

COLUMBIA PLANMnAIm CO-.WASNING'I'ON. l7. c.

UNTTEB STATES PTEN T uric.

CHARLES I-IAAS, 0F STRASSBURG, GERMANY, ASSIGNOR TO THE FIRM OF HERREN-SCHMIDT & 00., 0F STRASSBUBIG, GERMANY. V

ELECTRIC REVERSING-SWITGH AI TD CIBCUI'I'-CLOSER.

Original application filed September 19, 1912, Serial No. 721,152.

January 30, 1913.

To all whom it may concern Be it known that 1, CHARLES I-IAAs, a citizenof the Empire of Germany, and residing at Strassburg, Alsace, in theEmpire of Germany,'have invented certain new and useful Improvements inElectric Reversing- Switches and CircuitClosers, of which the followingis a specification.

My novel electric reversing switch, although capable of a generalapplication is intended especially for use in connection with electricplants for periodically and automatically reversing working machines,for instance tanning drums and the like, and my improvements in suchswitches relate to certain novel combinations and ar rangements ofparts, as are fully described hereinafter.

The present application is a division of my copending application forLetters Patent, Serial Number 721,152, filed September 19, 1912.

In order to make my invention more clear, I refer to the accompanyingdrawing, in which similar letters denote similar parts throughout theseveral views, and in which:

Figure 1 is an elevation, partly in section, of one form of execution ofa switch constructed according to my invention, and Fig. 2 is a plan ofthe mercury cups employed in this form of construction, together withsome adjacent parts.

In these figures two parallel sets of three mercury cups 1, 2, 3 and 4,5, 6 in each set are disposed on a suitable insulating base 7. The twoouter mercury cups 1 and 3 or 4 and 6 of each set are preferably curvedto a common are and the bottom of each middle mercury cup 2 or 5 ispreferably curved to an arc of a smaller radius having the same center.A shaft 8 is mounted above the two middle mercury cups 2, 5 to turn insuitable bearings 9 and 10, which bearings are only indicated in Fig. 2,as they may be varied to suit the circumstances. On the shaft 8 arefastened and insulated therefrom two parallel switches 11 and 12, eachof which consists of a disk permanently dipping in the mercury of themiddle cup 2 or 5, and an arm carrying two opposite dippers. One dipperof each switch 11, 12 is adapted to dip in one outer cup 1, 4 as shownand the other dipper to dip in the other outer cup Specification ofLetters Patent.

Patented Oct. 7,1913.

Divided and. this application filed. Serial No. 745,071.

3, 6. One outer cup 1 of the one set is connected by a'conductor 13 withthe opposite cup 6 in the other set and the outer cup 4 of the other setis connected by a conductor 14 with the opposite cup 3 of the first set.

In Figs. 1 and 2 it is assumed, that the automatic reversing device bealone contained in an electric three-phase plant for driving a singleworking machine by means of an electromotor. Then two phase leads a acoming from the source are connected with two left outer mercury cups 4,1 and the third phase line a is connected by its continuation Z2 withthe electromotor, while the latter is connected by two phase leads 5 bwith the two middle mercury cups 2 and 5 as shown in Fig. 2. F astenedon the shaft 8 is a pinion 15, which meshes with a toothed segment 16rocking at 17 in some frame or frame part (not shown.) The segment 16has a rear arm 18 and a horizontal arm 19. A. fly wheel 21 turningaround 22 in Fig. 1 is in any known manner constantly and slowly drivenin one direction only. For example the fly wheel 21 may be fastened on ashaft 22, which is driven from some electromotor (not shown) by means ofa gearing 23, 24 (indicated by dotted circles). The fly wheel 21 isshown to he stepped on the periphery, so that the right half has alarger radius than the left half and two opposite portions between thehalves have a radius of a length between the two radiuses. The rear arm18 of the segment 16 is adapted to bear against the periphery of the flywheel 21 under the pressure of a weight 20 at the free end of thehorizontal arm 19. The ratio of the two-armed lever 16, 18 is such, thatone dipper of the two switches 11, 12 fully engages in the respectiveleft mercury cup 1, 4, when the upper arm 18 bears against the left halfof the fly wheel 21 having the smallest radius, and the other dipperdips in the respective right mercury cup 3, 5, when the arm 18 bearsagainst the wheel portion having the largest radius. Vvhen the arm 18bears against either portion having the middle radius, the segment 16 isto occupy the middle position, so that neither dipper of the twoswitches 11, 12 dips in any cup. When the dippers of the two switches11, 12 dip in the two left mercury cups 1, 4 as shown, the latter arethereby electrically connected with the nidthe other clippers dip in thetwo right mer- -cnry cups 3, 6,;the electromotor will run in theopposite direction.

' This device is useful for automatically reversing working machineswhich require to run for a period in one direction and for an otherperiod in the other direction; For ex: ample tanning drums belongto thisclass of working machines. 7

Having now described my invention, what I desire to secure by a patentof the United States is:

1. In an automatic reversing device, the combination with two parallelsets of three contacts each, of a rocking shaft above the two middlecontacts, two switches fastened on and insulated from'said shaft andconstantlyr electrically connected with the two middle contacts andadaptedto simultaneously come in contact either with two outer contactson one side of said shaft. or with the two outer contacts on the otherside,

conductors connecting theouter contacts on both sides alternately withthese on the other side in the two sets, a fly wheel stepped on theperiphery, means for con stantly driving said fly wheel in one dire'cvtion, a pinion on said rocking shaft, a twoa rmed lever having a longarm and-a short arm, a toothed segment on the long arm of id le for m hng w t a d pinion, the r short arm of said lever being adapted to bearagainst the periphery of said fly Wheel, and means for pressing theshort arm of said lever against said fly wheel.

2. In an automatic'reversing device, the combination with two parallelsets of three mercury cups each, of a rocking shaft above the two middlemercury cups, two switches fastened on and insulated from said shaft,said two switches'constantly dipping inthe two: middle mercury cups andadapted to simultaneously dip either inthe two, outer mercury :cups onone side of sa d shaft. 'or

in the two outer mercury cups on the other side, conductors forconnecting the outer contacts on both sides alternately with those onthe other side in the two sets, a flywheel stepped on the periphery,means for constantly driving said fly wheel in one direce tion, a pinionon said rocking shaft; a two armed lever having a long arm and a shortarm, atoothed segment on the longar rn of said lever for meshing withsaid pinion, the short arm of said lever being adapted to bear againstthe periphery of said fly wheel,

and means for pressing'the short 'armfof 7 said lever against said flywheel, I

GHARLES HAAS.

Witnesses FRANCES R. Jnwn'r'r, Jason SCHMIDT.

Copies of this patent may be obtained for five was ea ii; bi addressingthe ri Commissioner 6f Patents, Washington, D. 0.? 7

